I have a 2004 147 2.0 with a rather tired engine which is drinking oil. I have a plan for what I want to do, but I'm looking for some advice on whether I'm barking up the wrong tree from some of you guys who know about this stuff
She's done 109k miles, has been thirsty for a good while but is now drinking about a litre every 200 miles. I'm currently using cheap supermarket 10w40, because whenever she's had better quality 10w40 it hasn't slowed the consumption.
The engine has had problems in the past, including head gasket changes and a rebuild. Despite all this, she runs well and shows no real signs of shipping all that oil. There's a bit of white smoke when cold, no mayo in the oil filler cap or the coolant. No leaks on the road. There's an amount of oil on and around the belt end of the sump, including clean new oil, but if she was leaking that much when under load I would expect to see oil all over the underside?
I can't afford or justify serious work and I'm a novice when it comes to engines. However I'm interested in what's causing this and I'll be happy keeping her running a bit longer so I'd like to do a bit of investigation myself .
My plan is to do a compression test. From what I've read on here and elsewhere, I reckon the problem is likely to be HG, piston rings or valve seals. If it's a HG or valves the head needs to come off to fix (too expensive, might as well do nothing or break for parts
). If it's rings I will change the oil to decent quality 10w60 and see if that helps the oil use.
Does this sound like a half decent plan?